Final answer:
A child receiving a reinforcer each time they sit down is an example of a Fixed Ratio 1 (FR1) reinforcement schedule. This schedule provides consistent reinforcement after every instance of the desired behavior, in contrast to variable ratio schedules like those used by slot machines which reward after an unpredictable number of actions.
Step-by-step explanation:
When a child is getting a reinforcer every time they sit down, the schedule of reinforcement being used is a Fixed Ratio 1 (FR1). This type of schedule means that reinforcement is delivered after every single instance of the desired behavior. In contrast to variable schedules, which provide reinforcement after an unpredictable number of responses or time interval, fixed ratio schedules deliver reinforcement at predictable and consistent rates.
Looking at examples, slot machines operate on a variable ratio reinforcement schedule, whereby rewards (money) are given out after an unspecified number of actions, which keeps gamblers engaged as they can't predict when they will win next. This leads to a high rate of response as people continue to play in hopes of the next reward. Other schedules, such as fixed interval and variable interval, depend on the passage of time, either set or varying, respectively.